Expansion Tank for Audi A4: Sintered Metal
This expansion tank for the Audi A4 is specified around sintered metal, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is premature wear on the first batch, or documentation that arrived after the container shipped. Both are specification problems, and both are preventable.
Specification
| Product | Expansion Tank |
|---|---|
| Vehicle application | Audi A4 |
| Material / finish | Sintered Metal |
| Typical use | Delivery Fleets |
| MOQ | 200 pieces per specification |
| Sampling | 7 working days, 5 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | REACH |
| Packing | 20 pieces per inner box, 200 per carton |
Material options
- Polypropylene — preferred when weight matters more than rigidity
- Aluminium Alloy — specified where the part sits close to a heat source
- Cast Iron — preferred when weight matters more than rigidity
- Nylon 66 — specified where the part sits close to a heat source
- Chromed Steel — specified where the part sits close to a heat source
Processes available
- sintering
- shot blasting
- die casting
- gravity casting
- laser cutting
- rubber vulcanisation
Fitment notes
Confirm the fitment against the VIN or the frame number before ordering; two model years often share a name and not a part.
Where it is used
The specification above is the one most often ordered for delivery fleets. Related applications include farm use, track days, mountain roads, off-road trails, ride-hailing fleets.
Quality and packing
- In-line inspection with AQL 4.0 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
What happens if a lot fails inspection?
The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the REACH-compliant build instead of a fresh interpretation.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 200 pieces per line.
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
Tell us the model, the fitment and the quantity and we will hold a production slot for you.
